EP4186504A1 - Solutions aqueuses pharmaceutiques orales comprenant de la mélatonine et leur utilisation - Google Patents

Solutions aqueuses pharmaceutiques orales comprenant de la mélatonine et leur utilisation Download PDF

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Publication number
EP4186504A1
EP4186504A1 EP21210499.6A EP21210499A EP4186504A1 EP 4186504 A1 EP4186504 A1 EP 4186504A1 EP 21210499 A EP21210499 A EP 21210499A EP 4186504 A1 EP4186504 A1 EP 4186504A1
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EP
European Patent Office
Prior art keywords
melatonin
oral pharmaceutical
aqueous solutions
pharmaceutical aqueous
solutions according
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Application number
EP21210499.6A
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German (de)
English (en)
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EP4186504B1 (fr
Inventor
Robin Davies
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Alissa Healthcare Research Ltd
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Alissa Healthcare Research Ltd
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Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K31/00—Medicinal preparations containing organic active ingredients
    • A61K31/33—Heterocyclic compounds
    • A61K31/395—Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins
    • A61K31/40—Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins having five-membered rings with one nitrogen as the only ring hetero atom, e.g. sulpiride, succinimide, tolmetin, buflomedil
    • A61K31/403—Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins having five-membered rings with one nitrogen as the only ring hetero atom, e.g. sulpiride, succinimide, tolmetin, buflomedil condensed with carbocyclic rings, e.g. carbazole
    • A61K31/404—Indoles, e.g. pindolol
    • A61K31/4045—Indole-alkylamines; Amides thereof, e.g. serotonin, melatonin
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K47/00—Medicinal preparations characterised by the non-active ingredients used, e.g. carriers or inert additives; Targeting or modifying agents chemically bound to the active ingredient
    • A61K47/06—Organic compounds, e.g. natural or synthetic hydrocarbons, polyolefins, mineral oil, petrolatum or ozokerite
    • A61K47/08—Organic compounds, e.g. natural or synthetic hydrocarbons, polyolefins, mineral oil, petrolatum or ozokerite containing oxygen, e.g. ethers, acetals, ketones, quinones, aldehydes, peroxides
    • A61K47/10—Alcohols; Phenols; Salts thereof, e.g. glycerol; Polyethylene glycols [PEG]; Poloxamers; PEG/POE alkyl ethers
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K47/00—Medicinal preparations characterised by the non-active ingredients used, e.g. carriers or inert additives; Targeting or modifying agents chemically bound to the active ingredient
    • A61K47/06—Organic compounds, e.g. natural or synthetic hydrocarbons, polyolefins, mineral oil, petrolatum or ozokerite
    • A61K47/22—Heterocyclic compounds, e.g. ascorbic acid, tocopherol or pyrrolidones
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K47/00—Medicinal preparations characterised by the non-active ingredients used, e.g. carriers or inert additives; Targeting or modifying agents chemically bound to the active ingredient
    • A61K47/06—Organic compounds, e.g. natural or synthetic hydrocarbons, polyolefins, mineral oil, petrolatum or ozokerite
    • A61K47/26—Carbohydrates, e.g. sugar alcohols, amino sugars, nucleic acids, mono-, di- or oligo-saccharides; Derivatives thereof, e.g. polysorbates, sorbitan fatty acid esters or glycyrrhizin
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K47/00—Medicinal preparations characterised by the non-active ingredients used, e.g. carriers or inert additives; Targeting or modifying agents chemically bound to the active ingredient
    • A61K47/46—Ingredients of undetermined constitution or reaction products thereof, e.g. skin, bone, milk, cotton fibre, eggshell, oxgall or plant extracts
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K9/00—Medicinal preparations characterised by special physical form
    • A61K9/08—Solutions
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P25/00—Drugs for disorders of the nervous system
    • A61P25/20—Hypnotics; Sedatives

Definitions

  • the present invention relates to oral pharmaceutical aqueous solutions comprising melatonin.
  • the invention relates to oral pharmaceutical aqueous solutions comprising melatonin for use in the prevention and/or treatment of insomnia or sleep disorders.
  • Melatonin with chemical name N -acetyl-5-methoxy-tryptamine or N -(2-(5-methoxy-1 H -indol-3-yl)ethyl)acetamide, having the following structural formula: is a substance found in animals, plants, fungi, and bacteria. In animals, it is a hormone that anticipates the daily onset of darkness, however in other organisms, it may have different functions. Likewise, the synthesis of melatonin in animals differs from that in the other organisms.
  • melatonin In animals, melatonin is involved in the entrainment (synchronization) of the circadian rhythms of physiological functions including sleep timing, blood pressure regulation, seasonal reproduction and many others. Many of melatonin's biological effects in animals are produced through activation of melatonin receptors, while others are due to its role as a pervasive and powerful antioxidant, with a particular role in the protection of nuclear and mitochondrial DNA.
  • the activity of melatonin at the MT1, MT2 and MT3 receptors is believed to contribute to its sleep-promoting properties, as these receptors (mainly MT1 and MT2) are involved in the regulation of circadian rhythms and sleep regulation.
  • melatonin may effectively improve sleep quality.
  • EP 3 206 665 B1 is directed to a substantially water-free parenteral bulk solution consisting of an anhydrous liquid preparation of melatonin containing at least:
  • WO2013/068565 relates to a powder obtained by spray drying comprising melatonin, leucine as a soluble excipient and a water-soluble surfactant.
  • the pharmaceutical composition is obtained by dissolving the powder in water and 5-40% of a polyalkylene glycol, preferably polyethylene glycol, to obtain a melatonin concentration of 3-30% by weight.
  • WO2015144965 is directed to parenteral formulations of melatonin comprising polyethylene glycol and polypropylene glycol.
  • WO 2016058985 discloses concentrated melatonin solution, wherein melatonin is present in a quantity of 10.0% or higher in a substantially water-free carrier mixture of ethanol and a polyethoxylated derivative.
  • the concentrated solution free of preserving agents, is suitable to prepare injectable sterile compositions for parenteral administration, or formulations for topical or oral administration.
  • WO2021038601 discloses an aqueous composition of melatonin comprising melatonin or melatonin in any acceptable form and at least one ingredient selected from a group consisting of solubilizers, crystal inhibitors, stabilizers, ad-oxidants, solubilizer which is also an anti-oxidant, chelating agents, complexing agents and a combination thereof wherein the concentration of melatonin in the composition is 0.5 mg/ml to 10 mg/ml and the aqueous composition is essentially free of preservative and optionally free of surfactant and co-solvent.
  • EP 3 530 289 A1 is directed to oral pharmaceutical solution comprising melatonin, propylene glycol within the range from 20 mg/ml to 500 mg/ml, sorbitol within the range from 20 mg/ml to 400 mg/ml and purified water, wherein the pH of the oral solution is from 3.0 to 5.0 and wherein the oral solution is free of parabens, glycerol, sorbic acid, sodium or potassium benzoate.
  • the present invention is directed to oral pharmaceutical aqueous solutions comprising melatonin, from 1 to 10 mg/ml of benzyl alcohol, propylene glycol, an anti-oxidant, a sweetening agent and a flavor.
  • the scope of the present invention is to provide a stable, aqueous pharmaceutical solution for oral administration comprising melatonin characterized by a pleasant-tasting.
  • oral pharmaceutical aqueous solutions comprising melatonin, from 1 to 10 mg/ml of benzyl alcohol, propylene glycol, an anti-oxidant agent, a sweetening agent and optionally a flavor are stable and pleasant-tasting.
  • aqueous pharmaceutical solutions of the invention it is possible to achieve chemical stability of melatonin and good physical and microbiological stability of the formulation in the aqueous vehicle along with a pleasant taste, which increases patients' compliance with treatment. Furthermore, the risk of contamination by opportunistic microbial pathogens, resulting in potential health consequences, is prevented in the solution of the invention.
  • the amount of melatonin in the aqueous pharmaceutical solution may vary from 0.5 to 3 mg/ml of aqueous solution, preferably the amount of melatonin is 1 mg/ml.
  • the melatonin content over time is equal to or not less than 95.0% by weight on its initial total amount, a melatonin content equal to or higher than 95.0% by weight on its initial total amount is retained in the formulation stored for 3-months at +40 °C (LC method, Ph. Eur. 2.2.29).
  • the content of related impurity substances of melatonin is equal or lower than 0.1% by weight for 5-Methoxytryptamine (5-TMT), equal or lower than 0.4% for any other secondary impurity, equal or lower than 1.0% by weight for sum of impurity.
  • 5-TMT 5-Methoxytryptamine
  • the amount of benzyl alcohol in the aqueous pharmaceutical solution may vary from 1 to 10 mg/ml of aqueous solution, preferably the amount of benzyl alcohol is 6 mg/ml.
  • the benzyl alcohol content over time is equal to or not less than 90.0% by weight on its initial total amount, a benzyl alcohol content equal to or higher than 90.0% by weight on its initial total amount is retained in the formulation stored for 3-months at +40 °C (LC method, Ph. Eur. 2.2.29).
  • the anti-oxidant agent is preferably sodium ascorbate in a concentration from 0.1 to 5 mg/ml of aqueous solution, preferably 1 mg/ml.
  • the amount of propylene glycol may vary from 30 to 100 mg/ml of aqueous solution, preferably 50-55 mg/ml.
  • the sweetening agent is preferably sucralose.
  • the amount of sweetening agent in the solution may range from 0.1 to 1 mg/ml of aqueous solution, preferably 0.5 mg/ml.
  • the oral pharmaceutical aqueous solutions of the invention may optionally comprise a flavor for flavouring and further improving the organoleptic properties of oral solutions.
  • the flavor is preferably strawberry flavor as strawberry flavour 113034 with specific odour of strawberry in liquid form.
  • the amount of flavor in the solution is preferably 0.0001 ml/ml.
  • the oral pharmaceutical aqueous solution may also comprise L-Arg, reduced glutathione or L-Met, preferably L-Arg.
  • the aqueous vehicle contains water, optionally in combination with a co-solvent.
  • Water is used is used as solvent, preferably it is purified water, water for the preparation of medicines other than those that are required to be both sterile and apyrogenic (Ph. Eur.).
  • the oral pharmaceutical aqueous has the following composition: Table 1 Component Amount/1 ml of formulation Amount/5 ml dose of solution Melatonin 1 mg 5 mg Sucralose 0.5 mg 2.5 mg Benzyl alcohol 6 mg 30 mg Sodium ascorbate 1 mg 5 mg Propylene glycol 52 mg 260 mg Strawberry flavour 0.0001 ml 0.0005 ml Water qs to 1 ml qs to 5 ml
  • the pharmaceutical aqueous solution of the invention may be prepared by conventional methods.
  • the pharmaceutical aqueous solution is prepared by dissolving the formulation comprising melatonin, benzyl alcohol, propylene glycol, an anti-oxidant agent, a sweetening agent and optionally a flavor into an aqueous vehicle.
  • the oral pharmaceutical aqueous solution are characterized by a microbiological contamination wherein:
  • the present invention is also directed to the use of oral pharmaceutical aqueous solutions in the prevention and/or treatment of insomnia, for example as a short-term treatment of primary insomnia characterised by poor quality of sleep in patients, and sleep disorders as jet lag disorder (circadian rhythm sleep-wake disorder). Furthermore, the invention relates to a method for treating insomnia and sleep disorders comprising administering to a patient in need thereof oral pharmaceutical aqueous solution comprising melatonin according to the present invention.
  • Example 1 Oral pharmaceutical aqueous solution containing melatonin
  • a melatonin 1 mg/ml formulation in form of oral aqueous solution has been prepared.
  • the composition of the solution is reported in Table 2 below.
  • Stability of melatonin in the pharmaceutical solution of Example 1 was evaluated using stressed storage conditions, i.e. keeping the solution in climatic chambers at +40°C/75% RH for testing weekly encompassing 1-month period, and further monthly covering 3 months in total.
  • Main parameters studied were visual observation on formulation colour changes over time, melatonin damage detected by RP-HPLC analysis method and microbial contamination. Visual test showed that after 4 weeks of storage the formulation changed colour to slightly yellow.
  • RP-HPLC results of melatonin analysis allowed quantifying of area percent of the principal melatonin peak, the indication on the retention of its integrity and possible damage/degradation of the molecule.
  • Table 3 The respective data are summarized in Table 3 showing that more than 96% of melatonin remained in formulations.
  • Table 3 Melatonin maintenance (area percent of principal peak, RP-HPLC analysis) in formulations of Example 1 containing different concentration of benzyl alcohol kept at stress conditions (+40°C) for 3 months Area percent for the principal peak, % Concentration of benzyl alcohol mg/ml Initial time analysis After 3 months storage 0.6 97.29 96.84 0.9 96.61 95.14
  • the method used for preservative effectiveness evaluation is as described in European Pharmacopoeia monograph 5.1.3. Requirements for oral preparations are described therein: after inoculation of pure culture of specified control micro-organism into drug product the titre of the bacteria must be reduced by 3-folds in 14 days (log reduction must be not less than 3), and no further increase of viable micro-organisms is allowed for next two weeks. For moulds and yeasts the quantity of micro-organisms must drop 10 times until 14th day of incubation, and no increase is allowed until next testing date (after 28 days incubation).
  • benzyl alcohol concentration is sufficient for inhibition of microbial growth of Aspergillus niger, Candida albicans, Escherichia coli, Pseudomonas aeruginosa and Staphylococcus aureus in melatonin solutions.
  • Example 4 Evaluation of antimicrobial preservative efficacy in the solution of Example 1
  • microbiological quality of the solution of Example 1 (melatonin 1 mg/ml oral solution) has been tested according to the requirements of Ph. Eur. 5.1.4 Microbiological quality of non-sterile pharmaceutical preparations and substances for pharmaceutical use for aqueous preparations for oral use. Standardized indicators of microbiological quality are:
  • brasiliensis 4.2 x 10 5 2.00 x 10 1 >5.3 ⁇ 1 Yes Table 6 log 10 reduction in number of viable micro-oranisms at 28 th day Test organism Avg. Titre (14 days),(CFU/mL) Avg. Titre (28 days), (CFU/mL) log 10 red (28 days) Requirements Conforms S. aureus 1.00 x 10 1 1.00 x 10 1 NI NI Yes P. aeruginosa 1.00 x 10 1 1.00 x 10 1 NI NI Yes E. coli 1.00 x 10 1 1.00 x 10 1 NI NI Yes C. albicans 1.00 x 10 1 1.00 x 10 1 NI NI Yes A. brasiliensis 2.00 x 10 1 1.00 x 10 1 >0.3 NI Yes
  • brasiliensis titter in the drug product must be between 10 5 - 10 6 CFU/mL* 4.02 x 10 5 Yes

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  • Health & Medical Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Medicinal Chemistry (AREA)
  • Pharmacology & Pharmacy (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Epidemiology (AREA)
  • General Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Anesthesiology (AREA)
  • Molecular Biology (AREA)
  • Botany (AREA)
  • Biochemistry (AREA)
  • Bioinformatics & Cheminformatics (AREA)
  • Biomedical Technology (AREA)
  • Neurology (AREA)
  • Neurosurgery (AREA)
  • Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
  • Organic Chemistry (AREA)
  • Medicinal Preparation (AREA)
  • Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
EP21210499.6A 2021-11-25 2021-11-25 Solutions aqueuses pharmaceutiques orales comprenant de la mélatonine et leur utilisation Active EP4186504B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP21210499.6A EP4186504B1 (fr) 2021-11-25 2021-11-25 Solutions aqueuses pharmaceutiques orales comprenant de la mélatonine et leur utilisation

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Application Number Priority Date Filing Date Title
EP21210499.6A EP4186504B1 (fr) 2021-11-25 2021-11-25 Solutions aqueuses pharmaceutiques orales comprenant de la mélatonine et leur utilisation

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EP4186504A1 true EP4186504A1 (fr) 2023-05-31
EP4186504B1 EP4186504B1 (fr) 2024-05-29

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Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013068565A2 (fr) 2011-11-10 2013-05-16 Eratech S.R.L. Solutions à base de mélatonine et poudres pour leur préparation
WO2015144965A1 (fr) 2014-03-27 2015-10-01 Servicio Andaluz De Salud Préparation durable sous forme de produit injectable de mélatonine stable à long terme
WO2016058985A1 (fr) 2014-10-13 2016-04-21 Therapicon S.R.L. Composition de mélatonine liquide anhydre
CN105687186A (zh) * 2015-12-31 2016-06-22 卢秋妤 一种安眠外用药物制剂及其制备方法
WO2019038586A1 (fr) * 2017-08-19 2019-02-28 Ftf Pharma Private Limited Composition pharmaceutique de mélatonine
EP3530289A1 (fr) 2018-02-26 2019-08-28 Lamda Laboratories S.A. Solutions pharmaceutiques orales comprenant de la mélatonine
WO2019161470A1 (fr) * 2018-02-22 2019-08-29 Cosmed Indústria De Cosméticos E Medicamentos S.A. Composition pharmaceutique sous forme de suspension aqueuse et utilisation d'une composition pharmaceutique sous forme de suspension aqueuse
WO2021038601A1 (fr) 2019-08-30 2021-03-04 Vijayendrakumar Virendrakumarji Redasani Compositions pharmaceutiques liquides de mélatonine pour administration orale et parentérale

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013068565A2 (fr) 2011-11-10 2013-05-16 Eratech S.R.L. Solutions à base de mélatonine et poudres pour leur préparation
WO2015144965A1 (fr) 2014-03-27 2015-10-01 Servicio Andaluz De Salud Préparation durable sous forme de produit injectable de mélatonine stable à long terme
WO2016058985A1 (fr) 2014-10-13 2016-04-21 Therapicon S.R.L. Composition de mélatonine liquide anhydre
EP3206665B1 (fr) 2014-10-13 2020-02-26 Worphmed Srl Composition de mélatonine liquide anhydre
CN105687186A (zh) * 2015-12-31 2016-06-22 卢秋妤 一种安眠外用药物制剂及其制备方法
WO2019038586A1 (fr) * 2017-08-19 2019-02-28 Ftf Pharma Private Limited Composition pharmaceutique de mélatonine
WO2019161470A1 (fr) * 2018-02-22 2019-08-29 Cosmed Indústria De Cosméticos E Medicamentos S.A. Composition pharmaceutique sous forme de suspension aqueuse et utilisation d'une composition pharmaceutique sous forme de suspension aqueuse
EP3530289A1 (fr) 2018-02-26 2019-08-28 Lamda Laboratories S.A. Solutions pharmaceutiques orales comprenant de la mélatonine
WO2021038601A1 (fr) 2019-08-30 2021-03-04 Vijayendrakumar Virendrakumarji Redasani Compositions pharmaceutiques liquides de mélatonine pour administration orale et parentérale

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